When the 2d8 damage dice both roll the same value.Confused: when you say "When the damage dice of the Living Bow doubles..." are you referring to when a crit doubles the damage dice or when the two dice for normal damage each show the same number (as in two 3s, two 5s, etc.)?
Soem clarity might be handy here.![]()
Like a pair of 1s, 2s, etc. So if you roll 8+8=16 you activate ability "8:".
On a crit, you roll 4d8 and any pair can be used (but just one).
This means 1 in 8 hits (12.5%) trigger an effect, and (100%-8 choose 4/8^4) = about 60% of crits do.
The goal is to make it go off reasonably often but not all the time, and cause a random useful effect - aoe hinder movement or damage or a pull or a vine appears and grabs a target.
Then, on a rare double 8 we get a long duration aoe effect, with rocks vines and trees all attacking your foes. The chance for the "pair of 8s" on a normal hit is 1/64 and on a crit is about 10%. So it will happen, just never reliably.